EP1073967B1 - Betriebsverfahren für rechnergesteuerte druckköpfe - Google Patents

Betriebsverfahren für rechnergesteuerte druckköpfe Download PDF

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Publication number
EP1073967B1
EP1073967B1 EP99914741A EP99914741A EP1073967B1 EP 1073967 B1 EP1073967 B1 EP 1073967B1 EP 99914741 A EP99914741 A EP 99914741A EP 99914741 A EP99914741 A EP 99914741A EP 1073967 B1 EP1073967 B1 EP 1073967B1
Authority
EP
European Patent Office
Prior art keywords
heads
nozzles
print
group
ink
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99914741A
Other languages
English (en)
French (fr)
Other versions
EP1073967A4 (de
EP1073967A2 (de
Inventor
Yoram Duchovne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scitex Vision Ltd
Original Assignee
Hewlett Packard Industrial Printing Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hewlett Packard Industrial Printing Ltd filed Critical Hewlett Packard Industrial Printing Ltd
Publication of EP1073967A2 publication Critical patent/EP1073967A2/de
Publication of EP1073967A4 publication Critical patent/EP1073967A4/de
Application granted granted Critical
Publication of EP1073967B1 publication Critical patent/EP1073967B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/145—Arrangement thereof
    • B41J2/15—Arrangement thereof for serial printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J19/00—Character- or line-spacing mechanisms
    • B41J19/14—Character- or line-spacing mechanisms with means for effecting line or character spacing in either direction
    • B41J19/142—Character- or line-spacing mechanisms with means for effecting line or character spacing in either direction with a reciprocating print head printing in both directions across the paper width
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2132—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding

Definitions

  • the present invention relates to computerized printing, and particularly to the operation of ink-jets printing heads.
  • a printing head as denoted H in Fig. 1a comprises a series of tiny ink- emitting nozzles N, and a computer programmed mechanism for controlling the timing of each and every one of the nozzles according to the pattern to be printed.
  • the printed pattern for example the letter a as shown in Fig. 1 b , is printed by the head H while traveling over a substrate, usually a paper sheet P, by a series of dots each formed by one of the vertically arranged nozzles. The accumulation of the dots completes the requested pattern.
  • the head completes a line or row over the paper sheet, the latter is pulled upwards and the head commences its travel in the opposite direction ( Fig. 1c ) to print the requested patterns such as s at the beginning (end) of the next raw and the letter o at the end of this reverse travel.
  • US-A 4 528 576 discloses a method according to the preamble of claim 1.
  • FIGs. 2a and 2b there is shown that more than one head --4 in the present example, denoted A, B, C and D -- have been combined and mounted onto the same carriage (not shown).
  • the heads are so programmed that ink-ejection cycles A-B-C-D-A and so forth are maintained, namely in exact succession (hereinafter "Mode 1").
  • Mode 1 printing speed is multiplied by four (or other number equal to the number of heads) without diluting the (longitudinal) density of dots.
  • the vertical density remains the same.
  • Fig. 3 there are shown the letters a , b and c . It is assumed, for the sake of explanation only, that the letters are composed of singular, discrete dots only - which of course is not the case in reality.
  • Mode 1 is such that the first column is produced by head A , the second by head B , the third by C and the fourth by D , and so forth in the same sequence.
  • the main advantage derived is, as above said, the multiplication of the carriage speed, and hence the reduction of overall printing duration.
  • the dots In printing processes, it sometimes occurs that the dots must be applied more than once on the same spot. This is required if the substrate is of an absorbent, fibrous or porous material such as cardboard or even cloth; or if certain parts of a text, or portions of colored prints are to be emphasized. Conventionally, in such cases, double or triple printing is applied, causing waste of time.
  • Mode 2 of the present invention method presents an effective solution, as exemplified in Fig. 5 .
  • Fig. 6 illustrates yet another mode of operation -- Mode 3 .
  • This mode contributes to the art of printing in the following manner. It may occur, during the printing process, that one or more of the nozzles become clogged or otherwise cease to function properly. In conventional systems, the complete head has to be replaced, should the quality (density) of the print be retained.
  • pairs (or more) of the series of heads are linked in such a fashion that one can replace the other regarding any given point.
  • a dot can be applied by either one of the pair of associated heads, in a selective, i.e. programmed, manner.
  • Mode 3 therefore allows for real time surveillance of the printing process, e.g. by using suitable scanners; once a local quality deterioration is observed, say because one of head A nozzle stopped working, a command will be transmitted to head C to "take over” and apply the ink to the same spot, previously fed by head A ; and the same with regard to the pair of B and D heads.
  • a matrix of 4x3 heads is assembled, driven by a common carriage (not shown).
  • the heads A to D are not alligned one with respect to the other, resulting in a rhombus or rhomboid patterned matrixes.
  • a part of head A is sidewise overlapped by head B ;
  • C overlaps A and B ; and
  • D overlaps A , B and C .
  • This arrangement attains most of the benefits of the Fig. 7 arrangement, but with a considerably smaller number of heads.
  • the four heads group is the most efficient, each head containing ink of one of the four basic colors (cyano, magenta, yellow and black) used in the colors separation technique.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Ink Jet (AREA)
  • Printers Characterized By Their Purpose (AREA)
  • Electronic Switches (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)

Claims (7)

  1. Verfahren zum Betrieb von Tintenstrahldruckköpfen, umfassend die Schritte:
    (i) Vorsehen von wenigstens zwei Druckköpfen (A, B, C, D) zum Drucken einer einzelnen Farbe, wobei jeder der Druckköpfe (A, B, C, D) mehrere Düsen aufweist, die zum Auftragen von Tintentropfen auf ein Substrat konfiguriert sind;
    (ii) Anordnen der Köpfe auf einem gemeinsamen Träger, der eingerichtet ist, sich über ein Substrat zu bewegen, wobei die Köpfe (A, B, C, D) so angeordnet sind, dass jede Düse aus einer ersten Gruppe von Düsen eines ersten der Druckköpfe (A, B, C, D) sich entlang eines Weges bewegt, der kollinear mit einer Düse aus einer zweiten Gruppe von Düsen eines zweiten der Druckköpfe (A, B, C, D) ist; und
    gekennzeichnet durch einen weiteren Schritt:
    (iii) Aktivieren der Köpfe um Tinte auf ein Substrat unter Verwendung von Düsen sowohl aus der ersten als auch der zweiten Gruppe von Düsen aufzutragen.
  2. Verfahren nach Anspruch 1, bei dem die Köpfe (A, B, C, D) auf eine Weise aktiviert werden, dass Düsen aus der ersten Gruppe von Düsen selektiv betätigt werden, um Tintentropfen auf das Substrat aufzutragen, um eine erste Spalte zu drucken, und Düsen aus der zweiten Gruppe von Düsen selektiv betätigt werden, um Tintentropfen aufzutragen, um eine zweite Spalte zu drucken, und so weiter.
  3. Verfahren nach Anspruch 1, bei dem die Köpfe (A, B, C, D) auf eine Weise aktiviert werden, dass Düsen der zweiten Gruppe von Düsen selektiv betätigt werden, um Tintentropfen auf das Substrat an den gleichen Stellen aufzutragen wie Tintentropfen, die von den entsprechenden Düsen aus der ersten Gruppe von Düsen aufgebracht wurden.
  4. Verfahren nach Anspruch 1, weiter umfassend Identifizieren wenigstens einer Düse aus der ersten Gruppe von Düsen als eine funktionsgestörte Düse, wobei die Köpfe (A, B, C, D) in einer Weise betätigt werden, dass, um ein erforderliches Muster zu drucken, eine entsprechende Düse aus einer anderen Gruppe von Düsen die Arbeit übernimmt.
  5. Verfahren nach Anspruch 1, bei dem die wenigstens zwei Druckköpfe (A, B, C, D) auf dem gemeinsamen Träger versetzt zueinander teilweise überlappend angeordnet sind.
  6. Verfahren nach Anspruch 1, bei dem die wenigstens zwei Druckköpfe (A, B) einen dritten Druckkopf (C) und einen vierten Druckkopf (D) einschließen, wobei der dritte und vierte Druckkopf (C, D) so angeordnet ist, dass jede Düse aus einer ersten Gruppe der Düsen eines ersten (A) der Druckköpfe (A, B, C, D) sich entlang eines Weges bewegt, der kollinear mit einer Düse aus jedem des dritten und des vierten Druckkopfs (C, D) ist.
  7. Verfahren nach Anspruch 6, bei dem die wenigstens vier Köpfe (A, B, C, D) auf dem gemeinsamen Träger versetzt zueinander teilweise überlappend angeordnet sind.
EP99914741A 1998-04-23 1999-04-20 Betriebsverfahren für rechnergesteuerte druckköpfe Expired - Lifetime EP1073967B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IL12418298A IL124182A (en) 1998-04-23 1998-04-23 Method of operating computerized printer heads
IL12418298 1998-04-23
PCT/IL1999/000209 WO1999054139A2 (en) 1998-04-23 1999-04-20 Method of operating computerized printer heads

Publications (3)

Publication Number Publication Date
EP1073967A2 EP1073967A2 (de) 2001-02-07
EP1073967A4 EP1073967A4 (de) 2001-07-11
EP1073967B1 true EP1073967B1 (de) 2008-10-08

Family

ID=11071428

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99914741A Expired - Lifetime EP1073967B1 (de) 1998-04-23 1999-04-20 Betriebsverfahren für rechnergesteuerte druckköpfe

Country Status (7)

Country Link
EP (1) EP1073967B1 (de)
JP (1) JP2002512138A (de)
AT (1) ATE410737T1 (de)
AU (1) AU3343699A (de)
DE (1) DE69939695D1 (de)
IL (1) IL124182A (de)
WO (1) WO1999054139A2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2001272265A1 (en) * 2001-07-05 2003-01-21 Creo Srl Improved uniformity ink jet system
JP7439476B2 (ja) * 2018-11-30 2024-02-28 株式会社リコー 液体吐出装置、吐出調整方法、及び吐出調整プログラム

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4528576A (en) * 1982-04-15 1985-07-09 Canon Kabushiki Kaisha Recording apparatus
US4593295A (en) * 1982-06-08 1986-06-03 Canon Kabushiki Kaisha Ink jet image recording device with pitch-shifted recording elements
US4547786A (en) * 1984-08-02 1985-10-15 Metromedia, Inc. Ink jet printing system
US4686538A (en) * 1984-10-31 1987-08-11 Canon Kabushiki Kaisha Tone recording method
US4940998A (en) * 1989-04-04 1990-07-10 Hewlett-Packard Company Carriage for ink jet printer
JP3391924B2 (ja) * 1995-01-31 2003-03-31 キヤノン株式会社 画像記録装置
JP3359211B2 (ja) * 1995-12-28 2002-12-24 キヤノン株式会社 記録方法および記録装置
JPH09277511A (ja) * 1996-04-18 1997-10-28 Fuji Xerox Co Ltd インクジェットプリント装置

Also Published As

Publication number Publication date
DE69939695D1 (de) 2008-11-20
WO1999054139A3 (en) 1999-12-09
EP1073967A4 (de) 2001-07-11
IL124182A (en) 2001-12-23
WO1999054139A2 (en) 1999-10-28
JP2002512138A (ja) 2002-04-23
ATE410737T1 (de) 2008-10-15
AU3343699A (en) 1999-11-08
EP1073967A2 (de) 2001-02-07

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